Microchip Technology JANTX1N5630A

Overview

JANTX1N5630A from Microchip (formerly Microsemi) is a hermetically sealed, unidirectional Transient Voltage Suppressor (TVS) diode in DO-13 metal package, designed for high-reliability military and aerospace transient protection. It features 6.45 V minimum breakdown voltage (V_BR), 6.40 V rated standoff voltage (V_WM), clamps transients to ≤11.3 V at 132 A peak pulse current (I_PP), and delivers 1500 W peak pulse power (10/1000 µs). It is commonly deployed in avionics power rail protection against ESD, EFT, and secondary lightning surges per IEC61000-4-2/-4-4/-4-5.

For engineers reviewing the JANTX1N5630A datasheet, JANTX1N5630A pinout, JANTX1N5630A application, or JANTX1N5630A equivalent, this device is selected for ruggedized through-hole surge suppression where hermetic sealing, radiation hardness, and MIL-PRF-19500/500 JANTX qualification are mandatory - especially in airborne systems with operating temperatures from –55 °C to +175 °C.

Technical Context

The JANTX1N5630A operates as a unidirectional avalanche diode, entering controlled breakdown when reverse voltage exceeds its 6.45–7.14 V V_BR range at 10 mA test current. Its clamping action limits transient voltage to ≤11.3 V under 132 A 10/1000 µs pulses, achieving sub-100 ps response time. The device is inherently radiation-hardened per MicroNote 050 and qualified to MIL-PRF-19500/500 Class JANTX.

Thermal performance is defined by 50 °C/W junction-to-lead resistance (at 10 mm lead length) and derated DC power dissipation of 1 W at T_L ≤ +125 °C. Its DO-13 metal-glass package ensures hermeticity, Tin-Lead plating per MIL-STD-750, and cathode connection to case - critical for grounding integrity in high-surge environments.

Key Specifications

Pinout & Package

DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads; cathode terminal electrically connected to case and marked by diode symbol on body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional TVS diode applications.

Compared with JANTX1N5630A, JANTX1N5630UR sacrifices hermeticity and radiation hardness for lower cost and RoHS compliance, while SMCJ6.0A trades military reliability and temperature range for surface-mount scalability - making JANTX1N5630A irreplaceable in mission-critical airborne and spaceborne systems.

Availability

JANTX1N5630A is available at Aetrix Electronics and suitable for avionics power bus protection, military vehicle ECUs, aerospace sensor interfaces, and ground support equipment requiring stable component supply across extended product lifecycles.

Supply support for JANTX1N5630A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology acquired Microsemi in 2018 and maintains its high-reliability analog and discrete portfolio, including radiation-hardened and military-qualified components for aerospace, defense, and industrial markets.

The JANTX1N5630A belongs to Microchip's legacy TVS diode family originally developed by Microsemi for extreme-environment transient suppression - engineered specifically for avionics, missile systems, and nuclear instrumentation where failure is not an option.

FAQ

What is the maximum clamping voltage of the JANTX1N5630A under peak surge conditions?

The JANTX1N5630A has a maximum clamping voltage (V_C) of 11.3 V when subjected to its rated 132 A peak pulse current (I_PP) under the standard 10/1000 µs waveform. This value is guaranteed across all units and temperature ranges per the T4-LDS-0096 datasheet, ensuring downstream circuitry remains within safe voltage margins during transient events. The JANTX1N5630A achieves this with minimal voltage overshoot due to its sub-100 ps response time and low dynamic impedance.

Is the JANTX1N5630A suitable for IEC61000-4-5 secondary lightning protection?

Yes, the JANTX1N5630A is explicitly rated for secondary lightning protection per IEC61000-4-5 with 42 Ω, 12 Ω, and 2 Ω source impedances - supporting Class 1 through Class 4 depending on source impedance. Its 1500 W peak pulse power and 132 A I_PP enable it to meet the 2 kV test level for Class 3 (42 Ω) and Class 2 (12 Ω) configurations. The JANTX1N5630A's hermetic DO-13 package ensures long-term reliability under repeated surge stress, unlike plastic-packaged alternatives.

Does the JANTX1N5630A have radiation hardness certification?

Yes, the JANTX1N5630A is inherently radiation-hardened per Microsemi MicroNote 050, a documented qualification confirming performance stability under total ionizing dose (TID) exposure typical of low-earth orbit and high-altitude flight. This radiation tolerance is built into the silicon process and packaging - no additional screening or derating is required. The JANTX1N5630A's qualification is integral to its MIL-PRF-19500/500 JANTX status and is validated across its full –55 °C to +175 °C operating range.

How is the cathode terminal configured on the JANTX1N5630A?

The cathode terminal of the JANTX1N5630A is electrically connected to the metal case and designated as Lead 1 per the DO-13 mechanical drawing. This configuration requires direct, low-inductance grounding of the case to the system chassis or earth reference plane to ensure optimal surge current shunting. The polarity is marked on the device body with a diode symbol, and the anode (Lead 2) connects to the line being protected. This design minimizes parasitic inductance during clamping - a critical factor for the JANTX1N5630A's sub-100 ps response.

What is the standoff voltage (V_WM) and why is it critical for selecting the JANTX1N5630A?

The JANTX1N5630A has a rated standoff voltage (V_WM) of 6.40 V, meaning it remains non-conductive with ≤500 µA leakage current up to this reverse voltage. This parameter is critical because V_WM must exceed the circuit's maximum continuous operating voltage - for example, it is correctly applied on 5 V logic rails or 6 V sensor supplies. Selecting a JANTX1N5630A with insufficient V_WM would cause excessive standby current and thermal stress; its 6.40 V rating provides a 0.4 V margin above standard 6 V systems while maintaining tight clamping at 11.3 V.